There we go – the growbeds on the long side are all done, the drains are all connected, and they’re plumbed in to the fish tank. And we’ve finally taken the plunge – the pump is now running automatically, once an hour:

Now I just need to start keeping an eye on the Ammonia readings to see how our bacteria are going – I guess they’ll be growing VERY slowly this week wth the frost we’ve been having.